Access all Apple devices and services with your Apple ID.
How to Create Apple ID for Kids under 13
When trying to set up a new Apple ID on an old iPad it says 'Could
Get an Apple ID for your child - Apple Support
Set up Ask to Buy - Apple Support
Apple ID Management: Creating and Using Your Account
Moved to a new country or region? - Apple Support
Could Not Create Apple ID This iPhone has been used to create too
Set up Family Sharing - Apple Support
How to create a new Apple ID – Apple Support (UK)
Change your Apple ID - Apple Support